“…Lung cancer remains the leading cause of cancer-related death. There were 19.3 million new cancer cases and 10 million deaths worldwide by 2020, among which an estimated 1.8 million deaths (18%) were due to lung cancer. , Early diagnosis and treatment are considered critical to lowering lung cancer morbidity and mortality, and the 5 year survival rate for I-stage lung cancer patients can reach 90%. , However, early-stage cancer tissue is difficult to detect, and conventional clinical diagnosis methods, including bronchoscopy after chest X-ray, , cytology after sputum analysis, − and low-dose computed tomography , cannot meet accurate detection requirements. Recently, many clinical cases have confirmed that some proteins [e.g., carcinoembryonic antigen (CEA)] or cytokines − in the serum of lung cancer patients, even at the early stage, are called serum tumor biomarkers, the abundance of which is related to the development status of lung cancer, and its types relate to different histological subtypes. , In this regard, accurate quantification of serum tumor biomarkers will provide a new method for the painless and non-invasive diagnosis of lung cancer.…”